The days of the week are all masculine.
They are:
| dimanche | Sunday |
| lundi | Monday |
| mardi | Tuesday |
| mercredi | Wednesday |
| jeudi | Thursday |
| vendredi | Friday |
| samedi | Saturday |
To say 'on Sunday', you do not use a preposition in French. 'On Sunday' is 'dimanche'.
'Every Sunday' is 'tous les dimanches'.